JP6158503B2 - Floating flap gate - Google Patents

Description

  The present invention is installed in, for example, an opening of a breakwater or a tide wall, and in order to prevent the increased water from flowing into a living space or underground space at the time of water increase, a floating body type that floats a door body and blocks the opening. It is about a flap gate.

  In order to prevent the increased water from flowing into the living space and underground space when the water increases, the buoyancy of the water that is going to flow in is used, and the door body is lifted around the rotation axis on the base end side, for example, a breakwater or tide There is a floating flap gate that blocks the opening of the wall (for example, Patent Document 1).

  However, the floating flap gate disclosed in Patent Document 1 has a problem that when the initial inflow speed is high, the floating operation of the door body 1 is delayed and overflows into the living space or the underground space (FIG. 11 (a )reference).

  Further, when the water level is lowered, the door body 1 shows a dangerous behavior in which the door body 1 is maintained up to a water level that is about 1/3 of the door body 1 and then suddenly falls (FIG. 11). (See (b)).

  Among the above-mentioned problems, a floating flap gate has been proposed in which the other end of a rope having a counterweight attached to one end is connected to a door body via a pulley in order to prevent overflow in the initial stage of inflow (for example, Patent Documents). 2).

  The floating-type flap gate proposed in Patent Document 2 compensates for the lack of buoyancy of the floating-type flap gate with the weight of the counterweight, thereby solving the delay in the floating operation of the door body at the initial inflow.

  However, like the floating flap gate proposed in Patent Document 2, when the weight of the counterweight is always applied in a direction that assists the floating operation of the door, it is difficult to fall down when the water level is lowered.

  Therefore, the applicant will not be able to overflow into the living space or the underground space due to the delay of the floating operation of the door body at the beginning of the inflow, and it will not be difficult to fall down even when the water level drops, and it will fall rapidly We proposed a floating flap gate that does not have such dangerous behavior (Patent Document 3).

  For example, as shown in FIG. 12, the floating-type flap gate 11 has a fixed pulley 15a, 15b and a movable pulley 15c at the other end of a rope 14 having one end attached to a rod 13 installed on both sides of the front end side of the door body 12. The counterweight 16 is attached to the movable pulley 15c.

  Then, the fixed pulley 15a is installed so that the counterweight 16 becomes the lowest point when the inclination angle θ with respect to the horizontal plane of the door body 12 in the middle of standing or lying down becomes 45 °, for example.

  In the floating flap gate 11 configured as described above, when the door 12 is raised due to water increase, the door 12 is pulled in the standing direction by the counterweight 16 until the inclination angle θ with respect to the horizontal plane becomes 45 °, thereby assisting the standing. (See FIGS. 13A and 13B). And when inclination-angle (theta) exceeds 45 degrees, the counterweight 16 becomes resistance and the standing speed of the door body 12 decelerates (refer FIG.13 (c)).

  On the other hand, when the door body 12 falls due to a drop in water level, the door body 12 assists in following the water level that is lowered by being pulled by the counterweight 16 until the inclination angle θ reaches 45 ° (FIG. 13). (See (d)). And when inclination-angle (theta) becomes smaller than 45 degrees, the counterweight 16 becomes resistance and the falling speed of the door body 12 decelerates.

  By the way, in the floating type flap gate 11, the rod 13 is passed through a guide hole 17 a formed in the side door contact 17, and fixed pulleys 15 a and 15 b, a moving pulley 15 c and a counter are installed in the internal space of the side door contact 17. A weight 16 is provided. The guide hole 17a also serves as a stopper for the door body 12 to stand up.

  However, when the fixed pulleys 15a and 15b, the moving pulley 15c and the counterweight 16 are installed in the internal space of the side door contact 17, the following problems are inherent.

  Since a fixed pulley, a moving pulley, a counterweight, and an internal space that enables movement of the moving pulley and the counterweight are required, the side door contact becomes large and the aesthetic appearance is impaired. On the other hand, when the internal space cannot be secured per side door, it cannot be installed.

JP 2001-214425 A JP 2003-253912 A JP 2012-241449 A

  The problem to be solved by the present invention is that the side door contact becomes large when a space allowing the movement of the pulley group, the counter weight and the counter weight is formed inside the side door. The point is that the beauty is impaired. On the other hand, if the space cannot be secured inside the side door, it cannot be installed.

  In the present invention, the side door contact is not increased and the aesthetic appearance is not impaired, and there is a case where a space for allowing the pulley group, the installation of the counterweight, and the movement of the counterweight cannot be secured inside the side door. It was made for the purpose of enabling installation.

The floating flap gate of the present invention is
When the water flows in and is installed at the opening or the entrance, the front end side of the door body rotates in the plane in the height direction in the direction of the inflowing water in order to block the opening or the entrance. A floating flap gate configured to be able to swing up and down with a shaft as a fulcrum,
The counterweight or spring attached to the other end of the rope having one end attached to the front end surface of the door body, and the rope is guided, and the inclination angle of the door body with respect to the horizontal plane during the standing or lying down is a predetermined angle. Sometimes, the counterweight has at least the lowest point or a pulley group installed so that the spring has a natural length. The rope is provided in a storage body provided at a position directly opposite to the rope mounting portion provided on the front end surface of the door body, and the other end side of the rope is disposed from the slit provided on the front surface of the storage body. The main feature is that it is retracted into the storage body.

  In the above-described present invention, the door body support for standing up, the shock absorption at the time of standing up completion, and the water level tracking mechanism at the time of overturning are installed in a storage body provided at a position opposite to the rope mounting portion on the front end surface of the door body in the overturned state. Since it arrange | positions, the storage space of the said mechanism becomes unnecessary in the side part of a door body. In the following, the door body standing assistance / impact absorption at the completion of standing up and the water level following mechanism at the time of overturning will be referred to as an auxiliary unit for door body operation.

  In the present invention, when the inclination angle θ with respect to the horizontal plane of the door body in the middle of standing or lying down is a predetermined angle, the door body is assisted in standing up or lying down, or resistance in standing or lying down. Accordingly, it is possible to prevent overflow at the beginning of inflow and sudden lodging before completion of lodging, and to reduce the impact at the time of completion of standing, and to improve the followability to the water level at the beginning of lodging.

  Further, in the present invention, when the standing is completed, the hydraulic load acting on the door body is supported by the counterweight and the rope, so that the guide hole for guiding the swinging movement of the door body can be omitted.

  Further, in the present invention, the auxiliary unit for door operation, etc. is disposed in the storage body provided at a position facing the rope attachment portion on the distal end surface of the door body in the lying state, so that the door body operation etc. The storage space for the auxiliary unit becomes unnecessary. Therefore, it can be installed even in a place where the side door contact cannot be installed, and in some cases, an existing wall can be used as a side wall.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram of the floating type flap gate of this invention, (a) is the figure seen from the side, (b) is the figure seen from the front, (c) is the figure seen from the plane, (d) is the standing front limit It is a perspective view of the storage body which has arrange | positioned auxiliary | assistant units, such as the front end surface part of a door body, and door body operation | movement. It is a figure explaining the arrangement | positioning position of the pulley group which comprises auxiliary units, such as door body operation | movement, (a) shows the time of standing up, (b) shows the time of a fall. It is the figure which showed the 1st form (column type) of auxiliary units, such as a door body operation | movement of the floating type flap gate of this invention, (a) The figure seen from the side surface, (b) is AA cross section of (a) FIG, (c) is a view as seen from the flat surface of the relative positions of the door body in the a-a cross section. It is the same figure as FIG. 3 which showed the 2nd form (thin type) of auxiliary units, such as door operation | movement of the floating-type flap gate of this invention. It is the same figure as FIG. 3 which showed the 3rd form (compact type) of auxiliary units, such as a door body operation | movement of the floating-type flap gate of this invention. It is the same figure as FIG. 3 which showed the 4th form (wide type) of auxiliary units, such as a door body operation | movement of the floating type flap gate of this invention. It is a figure explaining the principle of operation of the floating type flap gate of the present invention, (a) at the time of lodging before flooding, (b) at the beginning of flooding, (c) at the middle of standing up, (d) at the last standing up, (e) (F) is the initial stage of lodging, (g) is the figure which showed the late stage of lodging. It is the figure which looked at the schematic structure of the floating-type flap gate of this invention which used the linear compression coil spring instead of the counterweight from the side. (A) (b) is a figure explaining the operation | movement state of the linear compression coil spring with respect to the inclination angle of a door body, (a) is an inclination angle of 30 degrees, (b) is a figure at the time of a fall and standing time limit. It is. It is a figure explaining the operation | movement state of the linear tension coil spring with respect to the inclination-angle of a door body, (a) shows the case at the time of inclination and the time of standing up, when an inclination-angle is 30 degrees. It is a figure explaining the problem of the conventional floating body type flap gate, (a) is an inflow initial stage, (b) is the figure which showed the time of the water level fall. It is the schematic block diagram of the floating type flap gate which the applicant proposed previously, (a) is the figure seen from the side surface, (b) is the figure seen from the front. It is a figure explaining the principle of operation of the floating type flap gate which the applicant proposed previously, (a) shows the initial stage of flooding, (b) shows the middle stage of standing, (c) shows the late stage of standing, and (d) shows the initial stage of lodging. FIG.

  The purpose of the present invention is to make it possible to install even when the side door contact is large and the appearance is not impaired and the storage space of the auxiliary unit such as door operation cannot be secured inside the side door, An auxiliary unit such as a door body operation was realized by placing it in a storage body provided at a position opposite to the rope mounting portion on the distal end surface of the door body in a lying state.

The form for implementing this invention is demonstrated in detail using FIGS. 1-10.
FIG. 1 is a diagram showing a schematic configuration of a floating flap gate of the present invention.

  In FIG. 1, reference numeral 21 denotes a floating flap gate of the present invention installed on a road surface rs of an opening of a breakwater or a tide wall, for example. The floating flap gate 21 uses the water pressure of the flowing water w as a fulcrum to support the rotating shaft 22c on the base end side 22a when the water w tries to flow into the living space or underground space from the ocean (or river). As described above, the front end side 22b of the door body 22 is swung upright to block the opening in a watertight state.

  As shown in FIG. 1, the floating flap gate 21 of the present invention has one end of a wire rope 24 attached to a front end surface 22 d of a door body 22. As an example of attachment of the wire rope 24 to the front end surface 22d of the door body 22, in FIG. 1, brackets 23 are attached to, for example, both sides of the front end surface 22d of the door body 22, and one end of the wire rope 24 is attached to these brackets 23. Yes. The other end of the wire rope 24 is drawn into a slit 25a provided on the front surface of the storage body 25 provided at a position facing the bracket 23 on the front end surface 22d of the door body 22 when lying down.

  In addition, as shown in FIG. 1D, the slit 25a can be prevented from entering the inside of the storage body 25 by closing the slit 25a with a rubber plate 27 having a notch 27a parallel to the slit 25a.

  Inside the storage body 25, for example, a door body operation provided with a counterweight 26a, a pulley group composed of two upper and lower constant pulleys 26b and 26c, and a stopper 26d that defines the upper limit of the counterweight 26a, etc. Auxiliary unit 26 is associatedly arranged.

  The other end of the wire rope 24 drawn in from the slit 25a of the housing 25 is wound around the upper fixed pulley 26b from the lower fixed pulley 26c, and then attached to the counterweight 26a. The weight 26a is suspended.

  The two upper and lower fixed pulleys 26b and 26c guide the wire rope 24, and the counterweight 26a is at its lowest point when the inclination angle θ with respect to the horizontal surface of the door body 22 during the standing or lying down is a predetermined angle. Install in such a position. According to the investigation results of the inventors, it has been found that there is no problem if the inclination angle θ of the predetermined angle is in the range of 15 ° to 60 °.

  In other words, the counter pulley 26c positioned below has the counterweight 26a abutting against the stopper 26d when the door body 22 reaches the upright limit (see FIG. 2A), or is in perfect contact with the stopper 26d when lying down, Or the installation position is determined so that it may not contact | abut (refer FIG.2 (b)).

  That is, the length from the end of the wire rope 24 to the end of the winding of the wire rope 24 around the fixed pulley 26c positioned below is the length (B2 + A2) at the time of standing up rather than the length (B1 + A1) when lying down. The installation position of the fixed pulley 26c is determined so that the length becomes longer. Alternatively, the installation position of the fixed pulley 26c is determined so that the length (B1 + A1) when lying down is the same as the length (B2 + A2) when standing up.

  By doing in this way, compared with the case where it is set as one fixed pulley, maintaining the standing limit position of the door body 22, the installation position of the upper fixed pulley 26b is made into a low position, and the door body 22 is maintained. Can be supported at a predetermined standing limit (angle). Moreover, the lift of the counterweight 26a is securable by installing the upper fixed pulley 26b in a high position.

  The shape of the counterweight 26a and the installation position relationship between the counterweight 26a and the pulley group are not limited to those shown in FIGS. 1 and 2, but may be those exemplified in FIGS.

FIG. 3 shows two lower fixed pulleys 26c constituting the pulley group, and the counterweight 26a is moved up and down between the upper fixed pulleys 26b (column type). For this pillar shape, the paper length in the horizontal direction even if the same counterweight 26a and FIGS. 1 and 2, the depth D of the container 25 for accommodating the door body operation or the like auxiliary unit 26 (FIGS. 3 (a) ) Can be shortened.

  4 is a rectangular parallelepiped shape thinner than the counterweight 26a shown in FIGS. 1 and 2, and the door body width direction length L of the storage body 25 for storing the auxiliary unit 26 for door operation (FIG. 4B). (Length in the vertical direction of the paper) is reduced (thin). In the case of this thin shape, the interval W (see FIG. 4C) between the storage bodies 25 that store the auxiliary units 26 such as the door body operations that make a pair when the door body 22 is lying down can be widened.

  FIG. 5 shows a state in which the counterweight 26a shown in FIGS. 1 and 2 is recessed relative to the lower fixed pulley 26c, and the lower fixed pulley 26c can be inserted into the recessed portion (compact). Type). In the case of this compact type, even if it is the same type as in FIGS. 1 and 2, the depth D of the storage body 25 that stores the auxiliary unit 26 for door operation, etc. can be shortened.

In the example of FIGS. 1 to 5, the guide surfaces of the wire ropes 24 of the upper fixed pulley 2 6 b and the lower fixed pulley 2 6 c are arranged in the same direction, but as shown in FIG. 6. the guide surface of the wire rope 24 above the fixed pulley 2 6 b and the lower fixed pulley 2 6 c better be those arranged at an angle (wide type).

  Since the floating-type flap gate 21 of the present invention arranges the auxiliary unit 26 such as the door body operation inside the storage body 25 provided at a relative position to the rope mounting portion of the distal end surface 22d of the door body 22 in the lying state, A storage space for the auxiliary unit 26 such as door operation is not required on the side of the door 22.

  Accordingly, it is possible to install the floating flap gate 21 even in a place where the side door contact having the storage space for the auxiliary unit 26 such as door operation cannot be installed. In some cases, the existing wall is used as the side wall. It is also possible to do.

  Further, the floating flap gate 21 of the present invention does not impair the aesthetic appearance since the wire rope 24 is housed inside the housing body 25 when the door body 22 is lying down.

  In the floating flap gate 21 of the present invention having the above-described configuration, the following effects are exhibited when the door body 22 stands and when the door body 22 falls.

(When the door body 22 stands up: FIGS. 7A to 7E)
In the initial stage of flooding, the counterweight 26a descends from the lying state before the water discharge shown in FIG. (A), and the door body 22 is pulled in the standing direction to assist the standing (see FIG. (B)). When the inclination angle θ of the door body 22 with respect to the horizontal plane becomes, for example, 30 °, the door body 22 and the wire rope 24 are in a straight line (see FIG. 5C), and the counterweight 26a is at the lowermost position.

  When the inclination angle θ of the door body 22 with respect to the horizontal plane exceeds 30 °, the counterweight 26a rises due to the rising and swinging of the door body 22, so that the counterweight 26a acts as a resistance to reduce the rising speed of the door body 22 ( (D) (Refer to the figure), the impact force when the standing up is completed (see (e) figure) is reduced.

(When the standing door body 22 is lying down: FIGS. 7 (f) and 7 (g))
In the initial stage of lodging, the counterweight 26a is lowered, and the door body 22 is pulled in the falling direction and follows the drop in the water level (see FIG. (F)). When the inclination angle θ of the door body 22 with respect to the horizontal plane becomes 30 °, for example, the door body 22 and the wire rope 24 are aligned, and the counterweight 26a is at the lowermost position (the same state as (c)).

  When the inclination angle θ of the door body 22 with respect to the horizontal plane is smaller than, for example, 30 °, the counterweight 26a rises due to the fall of the door body 22, so the counterweight 26a becomes a resistance to reduce the fall speed of the door body 22 (( g) Refer to the figure), and the impact force when the lodging is completed (same condition as in (a) figure) is eased.

  The auxiliary unit 26 for door operation etc. constituting the floating flap gate 21 of the present invention may not have the configuration shown in FIGS.

  For example, as shown in FIG. 8, a compression coil spring 31 may be attached instead of the counterweight 26a.

When the compression coil spring 31 is used, for example, when the inclination angle θ of the door body 22 is 30 °, the compression coil spring 31 has a natural length as shown in FIG. Install so that the turning force in the direction is minimized. Then, when the door body 22 is lying down or standing up, the compression coil spring 31 is compressed as shown in FIG. 9B so that the turning force of the door body 22 in the standing direction or the lying down direction is maximized. To do.

  On the other hand, when the tension coil spring 32 is used instead of the compression coil spring 31, the inclination angle θ of the door body 22 is 30 ° so that the tension coil spring 32 has a natural length as shown in FIG. The tension coil spring 32 is extended as shown in FIG. 10 (b) when the door body 22 is lying down or standing up.

  The compression coil spring 31 or the tension coil spring 32 is not limited to a linear coil spring as shown in FIGS. 9 and 10, but a taper coil spring, a conical coil spring, a drum coil spring, a barrel coil spring, an unequal coil spring, and the like. A spring having nonlinear characteristics such as a pitch coil spring may be used.

  Further, in order from the shaft center side, for example, a first compression spring having a large diameter and a short length, a second compression spring having a medium diameter and a medium length, and a third compression spring having a small diameter and a long length are included. A combination coil spring may be used to make the tensile force non-linear.

  In this combination coil spring, all three compression springs are contracted when the door body is lying down. Then, the three compression springs start to extend from the initial standing stage to the first rising stage of the door body, and when the first rising stage is reached, the first compression spring returns to its original property.

  Next, from the first rising stage to the middle rising stage of the door body, the second compression spring and the third compression spring return to the normal dimension, and all three compression springs return to the natural length.

The third compression spring, the second compression spring, and the first compression spring are sequentially contracted from the middle of standing to the completion of standing of the door body, and all three compression springs are contracted when the standing is completed.
Note that when lying down, it is the opposite of when standing up.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, although the wire rope 24 is used in the above embodiment, fiber ropes such as polyamide, polyester, polyethylene, polypropylene, aramid, polyarylate, and ultrahigh density polyethylene may be used. .

  In the above example, the case where the floating flap gate 21 of the present invention is installed in the opening of the breakwater or the tide wall has been described. However, the installation location of the floating flap gate 21 of the present invention is the opening of the breakwater or the tide wall. However, it can be installed at the entrance of a facility or underground passage.

21 Floating Flap Gate 22 Door 22a Base End 22b Tip 22c Rotating Shaft 22d Tip 24 Wire Rope 25 Housing
25a slit 26 auxiliary unit for door operation, etc. 26a counterweight 26b, 26c constant pulley 31 compression coil spring 32 tension coil spring

Claims (3)

When the water flows in and is installed at the opening or the entrance, the front end side of the door body rotates in the plane in the height direction in the direction of the inflowing water in order to block the opening or the entrance. A floating flap gate configured to be able to swing up and down with a shaft as a fulcrum,
The counterweight attached to the other end of the rope having one end attached to the front end surface of the door body, and the rope is guided, and when the inclination angle of the door body with respect to the horizontal plane in the middle of standing or lying down becomes a predetermined angle And a pulley group installed so that the counterweight is at the lowest point, the door body support for standing up, shock absorption at the completion of standing up, and water level tracking mechanism at the time of falling down, the tip of the door body in the lying down state place the housing body provided on the mounting portion directly facing each other position of the rope which are provided on the surface, that pull the other end of the rope inside the container from a slit provided on a front face of the housing body Features a floating flap gate.   The pulley group is installed so that a spring is attached to the other end of the rope instead of the counterweight, and the spring has a natural length when the inclination angle reaches a predetermined angle. Floating flap gate.   The floating flap gate according to claim 1 or 2, wherein the pulley group includes at least two constant pulleys.

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